Answered: 1. Determine the current of each line…

Engineering

Electrical Engineering

1. Determine the current of each line and the neutral current and measure the total power supplied by the source.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter7: Parallel Circuits

Section: Chapter Questions

Problem 3PP: Using the rules for parallel circuits and Ohmslaw, solve for the missing values....

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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

Task 3
A three phase, four wire star connected load consisting of:
ZR: a resistor of 9500 in series with a 3H inductor
ZB: a resistor of 1950
ZY: a resistor of 1950 in series with a 4µF capacitor
Using the equipment available in the power lab (Room T017), connect the
given load to a three-phase supply available in the lab and:
3.1. Determine the current of each line and the neutral current and
measure the total power supplied by the source.
3.2. Analytically, calculate all currents and the total power and compare
with those obtained in measurements.
3.3. Device a method and measure the waveform of the neutral current.
Discuss the obtained waveform and the reason for any distortion in the
waveform
3.4. Validate your calculations using computer simulation

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